This magnificent bed and breakfast mansion, on the National Register of Historic Places, has endured for ten decades as an Ohio landmark. The GreatStone Castle Bed and Breakfast is constructed of Bedford Indiana limestone, 18 inches thick, and features a wrap around porch supported by intricate stone columns. Three turrets give this massive structure its castle-like appearance. Interior design results in elegance and comfort. GreatStone Castle Bed and Breakfast is finished in rare hardwoods from various countries, transported by sailing ship and rail, to their final destination atop a hill in Sidney, Ohio. Overlooking historic downtown Sidney, two acres of lawn, gardens, and 100 year-old oaks greet all who approach by the scenic circular drive.